Users Guide

● A fan stops functioning.
● A fan is removed from the chassis.
NOTE: During updates of CMC or iDRAC firmware on a server, some or all of the fan units in the chassis rotates at 100%.
This is normal.
To view the health status of fans, in the CMC Web interface, do any of the following:
1. Go to Chassis Overview.
The Chassis Health page is displayed. The upper right section of chassis graphics provides the top left view of the chassis
and contains the health status of the fans. Fan health status is indicated by the overlay of the fan sub-graphic. Move the
cursor over the fan sub-graphic. The text hint provides additional information about a fan. Click the fan sub-graphic to view
the fan information in the right pane.
2. Go to Chassis Overview > Fans.
The Fans Status page provides the status, speed measurements in revolutions per minute (RPMs), and threshold values of
the fans in the chassis. There can be one or more fans.
NOTE: In the event of a communication failure between CMC and the fan unit, CMC cannot obtain or display the health
status for the fan unit.
NOTE: The following message is displayed when both the fans are not present in the slots or if a fan is rotating at a low
speed:
Fan <number> is less than the lower critical threshold.
For more information, see the Online Help.
Configuring fans
Fan Offset — This feature allows you to increase the airflow delivery to the PCIe card slots. An example usage of the Fan
Offset is when you use high-power or custom PCIe cards that require more cooling than normal. The Fan Offset feature has
options of Off, Low, Medium, and High. These settings correspond to a fan speed offset (increase) of 20%, 50%, and 100% of
the maximum speed respectively. There is also minimum speed setup for each option, which is 35% for Low, 65% for Medium,
and 100% for High. However, based on the configuration, the minimum speeds for the Low, Medium, and High options could be
higher than these values.
Using the Medium Fan Offset setting for example, increases the speed of fans by 50% of its maximum speed. The increase is
above the speed already set by the system for cooling based on the installed hardware configuration.
With any of the Fan Offset options enabled, the power consumption is increased. The system is louder with the Low offset,
noticeably louder with the Medium offset, and significantly louder with the High offset. When the Fan Offset option is not
enabled, the fan speeds are reduced to the default speeds required for system cooling for the installed hardware configuration.
To set the offset feature, go to Chassis Overview > Fans > Setup. On the Advanced Fan Configuration page, from the
Value drop-down list corresponding to Fan Offset, select appropriately.
For more information about the Fan Offset feature, see the Online Help.
For setting up these features by using RACADM commands, user the following command:
racadm fanoffset [-s <off|low|medium|high>]
Viewing front panel properties
To view the front panel properties:
1. In the left pane, click Chassis Overview > Front Panel.
2. On the Properties page, you can view the following:
● Power Button Properties
● KVM Properties
● Front Panel Indicators
Viewing chassis information and monitoring chassis and component health
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